
\documentclass[times,10pt,twocolumn]{article} 
\usepackage[english]{babel}
\usepackage{enumerate}
\usepackage{graphicx}
\usepackage{amsmath,amssymb,amstext,amsthm}
\usepackage{comment}
\usepackage{color}
\usepackage{wrapfig}

\usepackage{tikz}
\usetikzlibrary{arrows,automata,backgrounds,calc,chains,fadings,folding,decorations.fractals,decorations.pathreplacing,fit,patterns,positioning,mindmap,shadows,shapes.geometric,shapes.symbols,through,trees,plotmarks}

\input{button.def}

\colorlet{c}{green}
\begin{document}
\pagestyle{empty}
\scalebox{5}{
  \begin{tikzpicture}[very thick]
  \begin{scope}[rounded corners=2mm,very thick,xscale=1]
  \fill [draw=none,top color=c!60,bottom color=c!25,shading=axis,shading angle=225] (0mm,0mm) circle (1cm);
  \clip (0mm,0mm) circle (1cm);
  \fill [draw=none,fill=c!10,opacity=.4] (-1mm,8mm) ellipse (.8cm and .5cm);
  \draw [c!50!black] (0,0) circle (1cm);
  \end{scope}
  \node at (0mm,0mm) {\scalebox{1.7}{{\bf\Huge !}}};
  \end{tikzpicture}
}
\end{document}
